Car-coupling



Patented Dec. 20, |898. C. S. & G. B. PARK.

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UNITED STATES PATENT OFFICE.

CIIARLES S. PARK AND GEORGE B. PARK, OF GREENFIELD, lVIASSACHSETTS.

CAR-COUPLING.

SPECIFICATION forming part of Letters Patent No. 616,203, dated December20, 1898.

Application filed February 8, 1898., Serial No. 669,539. (No model.)

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Be it known that we,OHARLEs S. PARK and GEORGE B. PARK, citizens of theUnited States, residing at Greeneld, in the county of Franklin and Stateof Massachusetts, have invented certain new and useful Improvements inCar-Couplers; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Our invention relates to car-,couplers in the class known as the Janneytype; and the invention consists in the construction, combination, andarrangement of the various part-s of the device, as shown, described,and particularly set forth in the drawings, the specication, and theclaims herewith presented. In this device the coupler is locked with itsfellow automatically in the act of antagonism, one of the couplers atthe time being open and the other closed. In the arrangement of ourcoupler we employ two tumblers, both of 'which are pivoted, hung, orhinged in the draw-head of the car. The unlocking is accomplishedthrough the agency of the chain attached to the upper of the twotumblers, which in the hands of the brakeman is drawn upward to releasethe tumblers and at the same time throw out the knuckle and the tongue,a part of it.

In the drawings illustrating our invention, Figure l is a plan or topview of one of the couplers. Fig. 2 is a side view broken away to showthe tumblers and other parts related thereto., y y, partly broken away,(see Fig. 2,) looking upward. Fig. et is a sectional view, taken partlyin a plane in line with the releasingchain, looking outward. Fig. 5is asectional View, taken partly in a plane in line with releasing-chain,showing tumblers, 5o. Fig. 6 is a detail showing the form of the uppertumbler.

Referring to the drawings, A is the drawbar.,tobe attached to a car inthe usual manner.

B is the draw-head, secured to the drawbar, having a form quite similarto the general form of draw-heads of this system. To one of the ears ofthe draw-head is hinged Fig. 3 is a horizontal section on line theknuckle C, provided centrally with a tongue D, integral therewith,adapted by its extension to engage one of the tumblers hinged and housedin said draw-head.

is a tumbler loosely hinged or hung on a pin or shaft a as an axis, xedhorizontally in the draw-head, having the form as shown in Fig. 6 of thedrawings. To this tumbler, on the longer side in its upper wall, issecured a chain b, which passes through the upper wall of the draw-head.This chain extends upward and is fixed to some convenient andeasily-worked mechanical device attached to the car and withinconvenient reach of the brakeman. 'y l-s a second tumbler which swingsupon apin or shaft c which runs partly through the draw-headhorizontally, it being duly keyed to prevent movement axially. Thistumbler y is notched, as shown in the drawings, and has opposite pointsd and e, adapted to bear against the tongue D of the knuckle in the actof opening and closing the latter or holding it closed.

The function of the tumbler as is to fall upon the tumbler y and thererest, carrying said tumbler down with a movement about its axis,

catching in its movement with the bearingf the tongue of the knuckle andcarrying said tongue against a projecting lug or stop E, xed in thedraw-head, in which position it and the knuckle are held irmly for thetime.

It will be noticed that the axis of the tum= bler a: is above and to oneside of the axis of the tumbler y and that the bearingpoint of tumblera; rests against a shoulder g of tumbler y. A pressure exerted againsttumbler y from below would not lift tumbler for the reason that suchpressure could only act indirectly against the axis of said tumbler 0o,which latter, being rigid, would not yield. Tumbler x, however, whenmoved about its axis with an upward pullwould act upon tumbler y, andthe bearing-point e of the tumbler y would act upon the tongue D to openthe knuckle, and thus open the coupler automatioally. The chain attachedto tumbler a; being now dropped, the opposite coupler coming in wouldstrike against the tongue D, throw it against the bearing f of thetumbler y, throw said tumbler back and shift the bearing e of IOOtumbler y, and thus alloW tumbler a: to fall upon said tumbler 'y andhold it to place with the coupler locked.

Ilaving lthus described our invention, what We claim as new, and desireto secure by Letters Patent, is-

1. The combination with the draw-head, of the two tumblers, formed withosets and notches, to insure unity of action, as described, pivoted oneabove the other and out of line axially, the upper arranged to fall uponthe lower, of-the knuckle, hinged in the. drawhead, having a-tongue toengage the lower tumbler and indirectly the upper one, as and for thepurpose specified.

2. In combination, the draw-head, formed witha suitable cavity toreceive the tumblers, the tumblers described pivoted therein or hingedupon separate axes `longitudinally with reference to the draw-bar, theknuckle provided with a beveled tongue adapted to engage the lower ofsaid tumblers the stop E and the releasing-chain all arranged as and forthe purpose set forth.

In testimony whereof we affix our signatures in presence of twoWitnesses.

CI'IARLES S. PARI. GEORGE B. PARK Witnesess:

JENNIE L. PARK, WV. O. D. THOMAS.

